2 Samuel 15:7-12

7After four1 years had passed, Absalom said to the king, “Please let me go to Hebron to fulfill a vow I have made to the LORD. 8For your servant made a vow while dwelling in Geshur of Aram, saying: ‘If indeed the LORD brings me back to Jerusalem, I will worship the LORD in Hebron.’2”

9“Go in peace,” said the king. So Absalom got up and went to Hebron.

10Then Absalom sent spies throughout the tribes of Israel with this message: “When you hear the sound of the horn, you are to say, ‘Absalom reigns in Hebron!’”

11Two hundred men from Jerusalem accompanied Absalom. They had been invited as guests and they went along innocently, for they knew nothing about the matter. 12While Absalom was offering the sacrifices, he sent for Ahithophel the Gilonite, David’s counselor, to come from his hometown of Giloh.

So the conspiracy gained strength, and Absalom’s following kept increasing.